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Frage 328

Which is the most common input and output impedance of MMICs?

  1. 50 ohmsRichtige Antwort
  2. 300 ohms
  3. 450 ohms
  4. 75 ohms

Erklärung

MMIC amplifiers are designed with 50-ohm input and output impedance so they drop straight into the 50-ohm world of coaxial cable, microstrip, and RF test equipment with no matching network. 75 ohms belongs to video and broadcast receiving systems, while 300 and 450 ohms are balanced feed line impedances.

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Frage 328: Which is the most common input and output impedance of… · FCC Amateur Extra Class (Element 4) · Questena